Question 1 with 1 blankimportante / nora / pensar / las cosas antes de tomar una decisión question 2 with 1 blanknecesario / (tú) / entender / la situación de esas personas question 3 with 1 blankbueno / clara / sentirse / cómoda en el apartamento nuevo question 4 with 1 blankurgente / mi madre / mostrarme / los papeles que llegaron question 5 with 1 blankmejor / david / dormir / antes de conducir la motocicleta question 6 with 1 blankmalo / los niños / pedirles / tantos regalos a sus abuelos

the answer is c. estudió

explanation:

to translate: last year a group from my school went to cuba and studied the history of the island. you would use preterite form because it was one time and they use fue in the sentence.

ah, so ustedes and nosotros are my 'go-to' if i am using spanish mainly in the states? interesting, but still slightly confusing, haha."

it seems that you are a little confused about subject pronouns. yo=i, tú/usted=you, nosotros=we, ustedes=you(plural), ellos/ellas=they.

in the case of vosotros, it is an informal replacement for "ustedes" in spain. similar to using "you all" in english.

even though it is not generally used in conversation outside of spain, it is used many times in literature. i would suggest having at least some familiarity to that form, at least to recognize what it is.